EP1341832A2 - Polyurethan-prepolymere mit nco-gruppen und niedrigem gehalt an monomeren polyisocyanat - Google Patents
Polyurethan-prepolymere mit nco-gruppen und niedrigem gehalt an monomeren polyisocyanatInfo
- Publication number
- EP1341832A2 EP1341832A2 EP01986855A EP01986855A EP1341832A2 EP 1341832 A2 EP1341832 A2 EP 1341832A2 EP 01986855 A EP01986855 A EP 01986855A EP 01986855 A EP01986855 A EP 01986855A EP 1341832 A2 EP1341832 A2 EP 1341832A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- groups
- polyisocyanate
- component
- nco
- monomeric
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups
- C08G18/4211—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols
- C08G18/4216—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic groups derived from aromatic dicarboxylic acids and dialcohols from mixtures or combinations of aromatic dicarboxylic acids and aliphatic dicarboxylic acids and dialcohols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S528/00—Synthetic resins or natural rubbers -- part of the class 520 series
- Y10S528/905—Polymer prepared from isocyanate reactant has adhesive property
Definitions
- the invention relates to a polyurethane (PU) prepolymer with isocyanate (NCO) groups and a low content of monomeric polyisocyanate, and to the production and use thereof.
- PU polyurethane
- NCO isocyanate
- Polyurethane prepolymers with NCO groups preferably containing NCO groups
- suitable hardeners mostly polyfunctional alcohols - they can easily be chain-extended or cross-linked to form high-molecular substances.
- Polyurethane prepolymers have gained importance in many areas of application, for example in the production of adhesives, coatings, casting resins and moldings.
- PU prepolymers with terminal isocyanate groups it is customary to react polyfunctional alcohols with an excess of monomeric polyisocyanates, generally at least predominantly diisocyanates.
- the molecular weight can be controlled at least approximately via the ratio of OH groups to isocyanate groups. While a ratio of OH groups to isocyanate groups of 1: 1 or close to 1: 1 generally leads to high molecular weights, for example at a ratio of about 2: 1 when using diisocyanates on average, each OH Group attached a diisocyanate molecule so that in the course of the reaction ideally no oligomer formation or chain extension occurs.
- a diisocyanate is used as an excess component in the reaction of diisocyanates with polyfunctional alcohols, generally at least predominantly diols, and the isocyanate groups of the diisocyanate have approximately the same reactivity, according to Schulz-Flory statistics, for example, a reaction ratio of NCO / OH of 2: 1 about 25% of the monomeric diisocyanate used as a monomer in the prepolymer.
- a content of monomeric polyisocyanate has a disruptive effect, for example, when it comes to volatile diisocyanates.
- Adhesives / sealants and in particular hot melt adhesives based on PU are processed at elevated temperatures.
- the processing temperatures of hot melt adhesives are between 100 ° C and 200 ° C, for example that of laminating adhesives between room temperature and 150 ° C.
- volatile diisocyanates such as IPDI or TDI, have a vapor pressure that should not be neglected. This noticeable vapor pressure is particularly serious when spraying, since significant quantities of isocyanate vapors can occur above the application device, which are toxic because of their irritating and sensitizing effects.
- volatile means substances which have a vapor pressure of more than about 0.0007 mm Hg or a boiling point of less than about 190 ° C (70 mPa) at about 30 ° C. If, instead of the volatile diisocyanates, low volatile diisocyanates are used, in particular the widespread bicyclic diisocyanates, for example diphenylmethane diisocyanates, PU prepolymers or adhesives based thereon are generally obtained with a viscosity which is usually outside the range which can be used for simple processing methods , This also happens / or additionally if you want to reduce the monomer content by reducing the NCO / OH ratio.
- the viscosity of the polyurethane prepolymers can be reduced by adding suitable solvents, which contradicts the mostly required absence of solvents.
- Another possibility for lowering the viscosity while avoiding solvents is to add an excess of monomeric polyisocyanates as a so-called reactive diluent. In the course of a later hardening process (after adding a hardener or by hardening under the influence of moisture), these are incorporated into the coating or adhesive bond.
- the content of the resulting amines, especially the primary aromatic amines, must be below the detection limit of 0.2 micrograms of aniline hydrochloride / 100 ml sample based on aniline hydrochloride (Federal Institute for Consumer Health Protection and Veterinary Medicine, BGW, after official collection of test methods according to ⁇ 35 LMBG - Examination of foods / Determination of primary aromatic amines in aqueous test foods). Migrates are undesirable in the packaging sector, especially in food packaging.
- the migration of the migrates through the packaging material can lead to contamination of the packaged goods; on the other hand, depending on the amount of free monomeric polyisocyanate capable of migration, long waiting times are necessary before the packaging material is "Migrat-free" and may be used ,
- the laminated plastic films often contain lubricants based on fatty acid amides.
- the reaction of migrated monomeric polyisocyanate with the fatty acid amide and / or moisture forms urea compounds which have a melting point which can be above the sealing temperature of the plastic films. This creates an alien anti-sealing layer between the film parts to be sealed, which counteracts a uniform seam formation.
- reactive adhesives that still contain monomeric polyisocyanate leads to problems, but also that which is placed on the market.
- DE-PS 953 012 describes a process for the production of soluble, higher molecular weight polyisocyanates capable of further implementation.
- polyhydric, low molecular weight alcohols are reacted with amounts of diisocyanates such that more than one and less than two iso- cyanate groups are eliminated.
- the special value of these new polyisocyanates is that due to their increased molecular weight they practically no longer show vapor pressure and are therefore harmless from a physiological standpoint.
- Suitable polyalcohols include ethylene glycol, hexanediol, diethylene glycol, methylhexanol. 4,4'-Diphenylmethane diisocyanate, hexamethylene diisocyanate and tolylene diisocyanate are mentioned as diisocyanates.
- DE 37 39 261 A1 relates to a process for the preparation of polyisocyanates containing urethang groups by reacting aromatic diisocyanates with polyhydric alcohols in the molecular weight range 62 to 250 and subsequently removing the unreacted, excess starting diisocyanate by special distillation.
- 2,4-Diisocyanatotoluene or its technical mixtures with 2,6-diisocyantotoluene are preferably used as diisocyanates.
- the process products are characterized by a particularly low content of free starting diisocyanate of less than 0.3% by weight.
- DE 41 40 660 A1 discloses polyisocyanates containing ether and urethane groups, prepared by reacting polyhydroxy polyethers in the molecular weight range from 350 to 500 with excess amounts of tolylene diisocyanate and subsequent removal of unreacted excess of this starting diisocyanate by distillation to a residual content of less than 0.1 wt .-%.
- prepolymers with a high monomer content, which, however, is obtained by distilling off or extracting the excess monomer, optionally with the use of an inert entrainer, to values less than 0 , 15% by weight can be reduced;
- Such prepolymers are characterized by particularly low viscosities and an isocyanate content between 4 and 11% by weight.
- WO 98/29466 describes a low-monomer PU prepolymer that is produced in two reaction steps.
- a partially inert (unsymmetrical) diisocyanate preferably TDI
- polyfunctional alcohols in the ratio OH: NC ⁇ between 4 and 0.55.
- a more reactive diisocyanate preferably MDI
- MDI is added in a deficit, based on the OH groups still free, in a second reaction step.
- EP 0019120 A1 describes a process for the production of elastic, weather-resistant sheet-like structures using a moisture-curing prepolymer, which is obtained by converting equimolar amounts of a polyol, reducing the content of monomeric TDI to below 1% by thin-film distillation and then reacting the reaction product with diphenylmethane diisocyanate and a polyol is obtained.
- the prepolymer has 5-15% by weight of free NCO groups.
- the proportion by weight of the reactive component (I) containing urethane groups in the mixture of component (I) and polyisocyanate (II) is in the range from 20 to 90% by weight
- Polyisocyanates (II) containing urethane groups are to be understood as compounds for the production of which monomeric polyisocyanates and polyols are used.
- additional compounds bearing functional groups which are reactive toward isocyanate groups can be used to prepare the polyisocyanates containing urethane groups.
- the polyisocyanates (II) containing urethane groups have at least two, preferably detached, NCO groups.
- the polyol component can contain only one polyol, but a mixture of two or more polyols can also be used as the polyol component.
- a polyol is understood to be a polyfunctional alcohol, i.e. a compound with more than one OH group in the molecule.
- “functional groups that are reactive toward isocyanate groups” are understood to mean functional groups which can react with isocyanate groups at temperatures up to 200 ° C. and, if appropriate, with addition of catalyst, with the formation of at least one covalent bond.
- Suitable reactive functional groups can be monofunctional in the sense of a reaction with isocyanates, for example OH groups or mercapto groups. pen. However, they can also be difunctional with respect to isocyanates, for example amino groups.
- a molecule with an amino group accordingly also has two functional groups which are reactive toward isocyanate groups. In this context it is not necessary for a single molecule to have two separate functional groups which are reactive toward isocyanate groups. It is crucial that the molecule can form a bond with two isocyanate groups, each forming a covalent bond.
- polyols can be used as the polyol component.
- these are aliphatic alcohols with 2 to 4 OH groups per molecule.
- the OH groups can be either primary or secondary.
- Suitable aliphatic alcohols include, for example, ethylene glycol, propylene glycol, butanediol-1, 4, pentanediol-1, 5, hexanediol-1, 6, heptanediol-1, 7, octanediol-1, 8 and their higher homologues or isomers, such as for the person skilled in the art they result from a stepwise extension of the hydrocarbon chain by one CH 2 group each or by introducing branches into the carbon chain.
- Highly functional alcohols such as, for example, glycerol, trimethylolpropane, pentaerythritol and oligomeric ethers of the substances mentioned with themselves or in a mixture of two or more of the ethers mentioned are also suitable.
- reaction products of low molecular weight polyfunctional alcohols with alkylene oxides, so-called polyethers can be used as the polyol component.
- the alkylene oxides preferably have 2 to 4 carbon atoms.
- Suitable examples are the reaction products of ethylene glycol, propylene glycol, the isomeric butanediols, hexanediols or 4,4'-dihydroxy-diphenylpropane with ethylene oxide, propylene oxide or butylene oxide, or mixtures of two or more thereof.
- the reaction products of polyfunctional alcohols, such as glycerol, trimethylolethane or trimethylolpropane, pentaerythritol or sugar alcohols, or mixtures of two or more thereof, with the alkylene oxides mentioned to form polyether polyols are also suitable.
- Particularly suitable are polyether polyols with a molecular weight of about 100 to about 10,000, preferably from about 200 to about 5,000.
- polyether polyols can be produced by condensation of, for example, glycerol or pentaerythritol with elimination of water. Polyols commonly used in polyurethane chemistry continue to be formed by the polymerization of tetrahydrofuran.
- the reaction products of polyfunctional low molecular weight alcohols with propylene oxide are particularly suitable under conditions in which secondary hydroxyl groups are at least partially formed.
- the polyethers are reacted in a manner known to those skilled in the art by reacting the starting compound with a reactive hydrogen atom with alkylene oxides, for example ethylene oxide, propylene oxide, butylene oxide, styrene oxide, tetrahydrofuran or epichlorohydrin or mixtures of two or more thereof.
- alkylene oxides for example ethylene oxide, propylene oxide, butylene oxide, styrene oxide, tetrahydrofuran or epichlorohydrin or mixtures of two or more thereof.
- Suitable starting compounds are, for example, water, ethylene glycol, propylene glycol-1, 2 or -1, 3, butylene glycol-1,4 or -1, 3, hexanediol-1, 6, octanediol-1,8, neopentylglycol, 1,4- Hydroxymethylcyclohexane, 2-methyl-1, 3-propanediol, glycerol, trimethylolpropane, hexanetriol-1, 2.6, butanetriol-1, 2.4 trimethylolethane, pentaerythritol, mannitol, sorbitol, methylglycosides, sugar, phenol, isononylphenol, resorcinol, hydroquinone , 1, 2,2- or 1, 1,2-tris (hydroxyphenyl) ethane, ammonia, methylamine, ethylenediamine, tetra- or hexamethyleneamine, triethanolamine, aniline,
- polyethers which have been modified by vinyl polymers.
- Such products are available, for example, in which styrene or acrylonitrile, or a mixture thereof, is polymerized in the presence of polyethers.
- Polyester polyols with a molecular weight of about 200 to about 10,000 are also suitable as the polyol component.
- polyester polyols can be used which are formed by reacting low molecular weight alcohols, in particular ethylene glycol, diethylene glycol, neopentyl glycol, hexanediol, butanediol, propylene glycol, glycerol or trimethylolpropane with caprolactone.
- polyester polyols are 1,4-hydroxymethylcyclohexane, 2-methyl-1,3-propanediol, 1,2-butanetriol, Triethylene glycol, tetraethylene glycol, polyethylene glycol, dipropylene glycol, polypropylene glycol, dibutylene glycol and polybutylene glycol.
- polyester polyols can be produced by polycondensation.
- difunctional and / or trifunctional alcohols with a deficit of dicarboxylic acids and / or tricarboxylic acids or their reactive derivatives can be condensed to polyester polyols.
- Suitable dicarboxylic acids are, for example, adipic acid or succinic acid and their higher homologues with up to 16 carbon atoms, furthermore unsaturated dicarboxylic acids such as maleic acid or fumaric acid and aromatic dicarboxylic acids, in particular the isomeric phthalic acids such as phthalic acid, isophthalic acid or terephthalic acid.
- Citric acid or trimellitic acid are suitable as tricarboxylic acids.
- polyester polyols from at least one of the dicarboxylic acids and glycerol mentioned, which have a residual OH group content are particularly suitable.
- Particularly suitable alcohols are hexanediol, ethylene glycol, diethylene glycol or neopentyl glycol or mixtures of two or more thereof.
- Particularly suitable acids are isophthalic acid or adipic acid or a mixture thereof.
- High molecular weight polyester polyols include, for example, the reaction products of polyfunctional, preferably difunctional alcohols (optionally together with small amounts of trifunctional alcohols) and polyfunctional, preferably difunctional carboxylic acids.
- polyfunctional, preferably difunctional alcohols instead of free polycarboxylic acids, the corresponding polycarboxylic acid anhydrides or corresponding polycarboxylic acid esters with alcohols with preferably 1 to 3 C atoms can also be used (if possible).
- the polycarboxylic acids can be aliphatic, cycloaliphatic, aromatic or heterocyclic or both. They can optionally be substituted, for example by alkyl groups, alkenyl groups, ether groups or halogens.
- polycarboxylic acids examples include succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, phthalic anhydride, tetrahydrophthalic anhydride, hexahydrophthalic anhydride, tetrachlorophthalic anhydride methylene tetrahydrophthalic anhydride, glutaric anhydride, maleic acid, maleic anhydride, fumaric acid, dinner fatty acid or trimer fatty acid or mixtures of two or more thereof are suitable. If necessary, minor amounts of monofunctional fatty acids can be present in the reaction mixture.
- polyesters can optionally have a small proportion of carboxyl end groups.
- Polyesters obtainable from lactones, for example based on ⁇ -caprolactone, also called “polycaprolactone”, or hydroxycarboxylic acids, for example ⁇ -hydroxycaproic acid, can also be used.
- polyester polyols of oleochemical origin can also be used.
- polyester polyols can be obtained, for example, from complete ring opening of epoxidized triglycerides of an at least partially olefinically unsaturated fatty acid-containing fat mixture with one or more alcohols with 1 to 12 carbon atoms and subsequent partial transesterification of the triglyceride derivatives to alkyl ester polyols with 1 to 12 carbon atoms in the alkyl radical.
- polystyrene resin examples include polycarbonate polyols and dimer diols (from Henkel) as well as castor oil and its derivatives, and the hydroxy-functional polybutadienes, such as are available, for example, under the trade name "Poly-bd", can be used as polyols for the compositions according to the invention le can be used.
- Polyacetals are also suitable as the polyol component.
- Polyacetals are understood to mean compounds such as are obtainable from glycols, for example diethylene glycol or hexanediol, or a mixture thereof with formaldehyde.
- Polyacetals which can be used in the context of the invention can likewise be obtained by the polymerization of cyclic acetals.
- Polycarbonates are also suitable as polyols.
- Polycarbonates can be obtained, for example, by the reaction of diols, such as propylene glycol, 1,4-butanediol or 1,6-hexanediol, diethylene glycol, triethylene glycol or tetraethylene glycol, or mixtures of two or more thereof with diaryl carbonates, for example diphenyl carbonate, or phosgene.
- Polyacrylates bearing OH groups are also suitable as polyol components. These polyacrylates can be obtained, for example, by polymerizing ethylenically unsaturated monomers which carry an OH group. Such monomers are obtainable, for example, by the esterification of ethylenically unsaturated carboxylic acids and difunctional alcohols, the alcohol usually being in a slight excess. Suitable ethylenically unsaturated carboxylic acids are, for example, acrylic acid, methacrylic acid, crotonic acid or maleic acid.
- Corresponding esters carrying OH groups are, for example, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl acrylate or 3-hydroxypropyl methacrylate or mixtures of two or more thereof.
- monomeric polyisocyanates in particular diisocyanates, are essential components of the polyisocyanates (II) containing urethane groups.
- isocyanates examples include 1,5-naphthylene diisocyanate, 2,4- or 4,4'-diphenylmethane diisocyanate (MDI), hydrogenated MDI (H ⁇ 2 MDI), xylylene diisocyanate (XDI), tetramethylxylylene diisocyanate (TMXDI), 4,4-diphenyldimethyl methane diisocyanate, di- and tetraalkylene diphenylmethane diisocyanate, 4,4'-dibenzyl diisocyanate, 1, 3-phenylene diisocyanate, 1,4-phenylene diisocyanate, the isomers of tolylene diisocyanate (TDI), 1-methyl-2,4-diisocyanato-cyclohexane, 1, 6-diisocyanato-2,2,4-trimethylhexane, 1,6-diisocyanato-2,4,4-trimethylhexane, 1-
- Sulfur-containing polyisocyanates are obtained, for example, by reacting 2 mol of hexamethylene diisocyanate with 1 mol of thiodiglycol or dihydroxydihexyl sulfide.
- Other usable diisocyanates are, for example, trimethylhexamethylene diisocyanate, 1,4-diisocyanatobutane, 1,12-diisocyanatododecane and dimer fatty acid diisocyanate.
- tetramethylene hexamethylene, undecane, dodecamethylene
- 2,2,4-trimethylhexane-2,3,3-trimethylhexamethylene 1, 3-cyclohexane
- 4-cyclohexane 1, 4-cyclohexane, 1 , 3- or 1 4-tetramethylxylene
- isophorone 4,4-dicyclohexyl methane and lysine ester diisocyanate.
- TMXDI tetramethylxylylene diisocyanate
- m-TMXDI from Cyanamid
- Suitable at least trifunctional isocyanates are polyisocyanates which are formed by trimerization or oligomerization of diisocyanates or by reaction of diisocyanates with polyfunctional compounds containing hydroxyl or amino groups.
- Isocyanates suitable for the preparation of trimers are the diisocyanates already mentioned, the trimerization products of the isocyanates HDI, MDI or IPDI being particularly preferred.
- polymeric isocyanates such as those obtained as a residue in the distillation bottoms from the distillation of diisocyanates.
- polymeric MDI as is available in the distillation of MDI from the distillation residue, is particularly suitable.
- the NCO groups of the polyisocyanates can have different reactivities towards compounds bearing functional groups reactive with isocyanates. This applies in particular to diisocyanates with NCO groups in different chemical environments, that is to say to asymmetrical diisocyanates. It is known to be dicyclic The reaction rate of diisocyanates or generally symmetrical diisocyanates is higher than that of the second isocyanate group of asymmetrical or monocyclic diisocyanates.
- TDI tolylene diisocyanate
- IPDI isophorone diisocyanate
- reactive component (I) containing urethane groups means that it both has at least one urethane structural unit and also contains at least one, preferably two or more, reactive functional groups which are at temperatures from -5 ° C. to 200 ° C. , possibly under the action of catalysts, can react with other functional groups to form a covalent bond.
- Preferred functional groups in the context of the invention are functional groups which are reactive toward isocyanate groups, such as, for example, -OH; - SH; -NH 2 ; -NH; or groups such as NGO or epoxy groups.
- Component (I) contains both NCO groups and groups which are reactive towards NCO groups as component (Ia), NCO groups as component (Ib) and groups which are reactive towards isocyanate groups as component (Ic).
- the reactive component (I) containing urethane groups contains as component (Ia) both NCO groups and functional groups which are reactive towards isocyanate groups.
- Component (la) is prepared by at least one asymmetrical monomeric polyisocyanate, selected from the group: all isomers of tolylene diisocyanate (TDI), either in isomerically pure form or as a mixture of several isomers; 1-isocyanatomethyl-3-isocyanato-1, 5,5-trimethyl-diisocyanate (isophorone diisocyanate, IPDI); 2,4-diphenylmethane diisocyanate with at least one compound bearing functional groups reactive toward isocyanate groups, preferably with at least one polyol.
- TDI tolylene diisocyanate
- IPDI isophorone diisocyanate
- IPDI 2,4-diphenylmethane diisocyanate with at least one compound bearing functional groups reactive toward isocyanate groups, preferably with at
- the Implementation takes place in the ratio NGO to OH between 1.05 to 1.8: 1.
- the end of the reaction is reached when the more reactive NCO groups of the monomeric polyisocyanate have reacted practically completely with some of the available functional groups which are reactive toward isocyanate groups, but a reaction of the less reactive NCO groups has not yet taken place or has not taken place significantly.
- This time of reaction can be determined by analytical tracking of the reaction.
- the reaction can be followed spectroscopically (IR) or titrimetrically.
- IR spectroscopically
- the molar ratios are chosen so that after the more reactive isocyanate groups have reacted, there are still free functional groups, preferably OH groups, which are reactive toward isocyanate groups.
- the component (Ia) obtained in this way is characterized by a molar mass of 500 to 20,000 g / mol, determined by gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- the viscosity of (la) is in the range of 500 to 25,000 mPas, determined according to Brookfield (ISO 2555). This means that at 20 ° C the viscosity does not fall below 500 mPas and at 100 ° C the viscosity does not exceed 25,000 mPas.
- the NCO content is in the range of 1 to 10% by weight, determined according to Spiegelberger (EN ISO 11909). If the asymmetrical monomeric polyisocyanate is reacted with at least one polyol, the hydroxyl number of (la) is in the range from 5 to 50, measured according to ISO 4326.
- the reactive component (I) containing urethane groups contains NCO groups as component (Ib) and can be obtained by reacting at least one monomeric polyisocyanate with at least one compound bearing functional groups which are reactive toward isocyanate groups, preferably with at least one polyol.
- the reaction takes place in the NCO to OH ratio of 1.05: 1 to 3: 1, preferably from 1.05: 1 to 2: 1 and particularly preferably from 1.05: 1 to 1.2: 1.
- the end of the reaction is reached when the functional groups which are reactive toward isocyanate groups have reacted virtually completely. This time of reaction can be determined by analytical tracking of the reaction.
- the reaction can be followed spectroscopically (IR) or titrimetrically.
- the thus obtained reactive component (Ib) containing urethane groups is characterized by a molar mass of 500 to 20,000 g / mol, determined by gel permeation chromatography (GPC). At a temperature of 20 ° C to 100 ° C, the viscosity of (Ib) is in the range of 500 to 25,000 mPas determined according to Brookfield (ISO 2555).
- the NCO content is in the range of 1 to 10% by weight, determined according to Spiegelberger (EN ISO 11909).
- the OH number is zero and the monomer concentration is greater than 0.5% by weight, preferably greater than 1% by weight and particularly preferably greater than 2% by weight.
- the monomer concentration is less than 30% by weight, preferably less than 20% by weight and particularly preferably less than 10% by weight.
- Component (Ic) containing functional groups which are reactive towards isocyanate groups is also used as component (I) containing urethane groups.
- Component (Ic) is prepared by reacting at least one monomeric polyisocyanate with at least one compound bearing functional groups that are reactive toward isocyanates, preferably with at least one polyol, in a ratio of NCO to OH between 0.1 and 0.8: 1 until the isocyanate Groups have reacted almost completely. This time of reaction can be determined by analytical tracking of the reaction. The reaction can be followed spectroscopically (IR) or titrimetrically.
- the component (Ic) thus obtained can be characterized by a molar mass of 500 to 20,000 g / mol, determined by gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- the viscosity of (Ic) is in the range from 500 to 25,000 mPas, determined according to Brookfield (ISO 2555). This means that at 20 ° C the viscosity does not fall below 500 mPas and at 100 ° C the viscosity does not exceed 25,000 mPas.
- the hydroxyl or (OH) number determined according to ISO 4326, is in the range from 5 to 50.
- the NCO content is zero% by weight.
- the low-monomer, urethane group-containing polyisocyanate (II) is prepared by reacting at least one monomeric polyisocyanate with at least one polyol, preferably with at least one diol.
- a high stoichiometric excess of polyisocyanates in relation to the polyols is expediently chosen.
- An NCO: OH ratio of 2: 1 to 10: 1 is preferred, in particular an NCO: OH ratio of 3: 1 to 7: 1 is preferred.
- the OH number of the polyisocyanate (II) is zero.
- the monomeric polyisocyanates used are preferably symmetrical diisocyanates and particularly preferably dicyclic diisocyanates.
- Low-monomer means a low concentration of the monomeric polyisocyanates in the polyisocyanate (II).
- concentration of these so-called “residual monomers” is below one, preferably between 0 and 0.5% by weight, particularly preferably between 0 and 0.2 % By weight, based on the polyisocyanate (II) containing urethane groups.
- the low monomer content is achieved by removing the monomeric polyisocyanate from the reaction product after the reaction of polyisocyanate with polyol.
- the cleaning step can be carried out according to methods known per se, such as distillation, extraction, chromatography or crystallization methods, individually or, if appropriate, in combination of the methods listed.
- lower alkanediols it has proven useful to take advantage of the low solubility of the polyisocyanate (II) containing urethane groups in some solvents by adding a non-solvent for the polyisocyanate (II) containing urethane groups, which is at the same time a solvent, after the diol / diisocyanate reaction has ended for the monomeric diisocyanate.
- the urethane group-containing polyisocyanate is precipitated from the reaction mixture and freed from unreacted monomeric diisocyanate by filtration or by centrifugation.
- This method is particularly useful when the less volatile monomeric diisocyanates such as MDI are to be used.
- Non-solvents are, in particular, non-polar aprotic organic solvents such as, for example, ethyl acetate, chlorobenzene, xylenes, toluene, or in particular boiling-point petrol. If volatile monomeric diisocyanates such as TDI, MDI, TMXDI, IPDI, XDI are used, the excess monomeric diisocyanate can also be removed from the reaction mixture by distillation.
- distillation is preferably carried out in vacuo with the aid of a thin-film evaporator or a thin-film evaporator.
- Such distillation processes are described, for example, in the Plastics Handbook Volume 7, “Polyurethanes”, GW Becker (Editor), Hanser-Verlag, Kunststoff, 3rd edition 1993, page 425.
- Another possibility of removing the monomeric diisocyanate from the reaction mixture is the selective extraction of the monomeric diisocyanate, for example using supercritical carbon dioxide or other supercritical aprotic solvents.
- This extraction method is known for example from WO-97/46603.
- the polyurethane prepolymer according to the invention is produced by producing in a first reaction step at least one reactive component (I) containing urethane groups as a) as component (Ia) by at least one asymmetrical monomeric polyisocyanate with at least one compound bearing functional groups that are reactive toward isocyanates in the ratio NCO.OH between 1.05 to 1.8: 1 until the more reactive NCO groups of the monomeric polyisocyanate have reacted almost completely with some of the available functional groups that are reactive toward isocyanate groups and / or b) a component (Ib) is prepared by reacting at least one monomeric polyisocyanate with at least one compound bearing functional groups which are reactive toward isocyanate groups, preferably with at least one polyol, in a ratio of NCO: OH of between 1.05 to 3: 1 until virtually completely the opposite Functional G reactive to isocyanate groups groups reacted and / or c) a component (Ic) is prepared by reacting at least one monomeric polyisocyanate
- the proportion by weight of the reactive component (I) containing urethane groups in the (reaction) mixture of (I) with polyisocyanate (II) is in the range from 20 to 90% by weight, preferably in the range from 50 to 90% by weight and in particular preferably in the range from 70 to 90% by weight.
- the preparation of reactive urethane group-containing component (I) and polyisocyanate (II) and the reaction of (Ia) and / or (Ic) with (II) can be carried out, for example, in the presence of solvents.
- solvents In principle, all solvents commonly used in polyurethane chemistry can be used as solvents, in particular esters, ketones, halogenated hydrocarbons, alkanes, alkenes and aromatic hydrocarbons.
- solvents examples include methylene chloride, trichlorethylene, toluene, xylene, butyl acetate, amyl acetate, isobutyl acetate, methyl isobutyl ketone, methoxybutyl acetate, cyclohexane, Cyclohexanone, dichlorobenzene, diethyl ketone, di-isobutyl ketone, dioxane, ethyl acetate, ethylene glycol monobutyl ether acetate, ethylene glycol monoethyl acetate, 2-
- Ethylhexyl acetate glycol diacetate, heptane, hexane, isobutyl acetate, isooctane, isopropyl acetate, methyl ethyl ketone, tetrahydrofuran or tetrachlorethylene or mixtures of two or more of the solvents mentioned.
- reaction components themselves are liquid or at least one or more of the (reaction) components form a solution or dispersion of further, sufficiently liquid (reaction) components, the use of solvents can be dispensed with entirely. Such a solvent-free reaction is preferred in the context of the present invention.
- the temperature is usually increased. As a rule, the temperature is raised to about 40 to about 80 ° C. The onset of exothermic reaction then causes the temperature to rise.
- the temperature of the batch is kept at about 70 to about 110 ° C, for example at about 85 to 95 ° C or in particular at about 75 to about 85 ° C, if necessary the temperature is adjusted by suitable external measures, for example heating or cooling.
- customary catalysts can optionally be added to the reaction mixture.
- the addition of dibutyltin dilaurate or diazabicyclooctane (DABCO) is preferred. If it is desired to use a catalyst, the catalyst is generally added to the reaction mixture in an amount of from about 0.005% by weight or from about 0.01% to about 0.2% by weight, based on the overall batch ,
- the reaction time depends on the polyol component used, on the monomeric polyisocyanate used, on further compounds with functional groups reactive towards isocyanate groups, on the reaction temperature and on the catalyst which may be present.
- the total reaction time is usually about 30 minutes to about 20 hours.
- the mixing of the reactive component (I) containing urethane groups, in particular component (Ib) with polyisocyanate (II) to homogeneity is carried out at a temperature of 20 ° C. to 100 ° C., preferably between 40 ° C. and 80 ° C., optionally with the addition of solvents already described and optionally in an inert gas atmosphere.
- the starting materials for the preparation of the reactive component (I) containing urethane groups and the polyisocyanate (II) are identical, in particular if component (Ib) containing NCO groups is used as component (I) containing urethane groups.
- component (Ib) is first prepared and 20 to 90% by weight of the batch is removed after a desired NCO value or a desired viscosity has been reached.
- Monomeric polyisocyanate is again added to the remaining amount up to an NCO: OH ratio of 2: 1 to 10: 1 and the reaction is continued until a desired NCO value or a desired viscosity is reached.
- Unreacted monomeric polyisocyanate is then separated off by at least one of the processes described or in a combination of these processes.
- the previously removed amount of the reactive urethane group-containing component (Ib) is mixed into the low-monomer-containing polyisocyanate (II) containing urethane groups.
- the particular advantage of the polyurethane prepolymer according to the invention is that, depending on the desired application, the viscosity is tailored, low-monomer, in the case of the reaction of component (Ic) containing functional groups reactive to isocyanate groups, even monomer-free PU prepolymers a high isocyanate content can be produced by the NCO end groups of a low-viscosity, low-monomer reaction medium, the urethane group-containing polyisocyanate (II) with a) functional groups of a higher molecular weight reaction medium which are still reactive towards isocyanate groups, component (Ia) or (Ic), are reacted and / or b) are mixed with component (Ib).
- the polyurethane prepolymer according to the invention with free isocyanate groups and a low content of monomeric polyisocyanate preferably has a content of monomeric polyisocyanates of less than 2% by weight or less than 1% by weight or preferably less than 0.5% by weight on. These limits apply in particular to volatile isocyanate compounds which have only a limited risk potential for persons involved in their processing, for example for isophorone diisocyanate (IPDI), hexamethylene diisocyanate (HDI), tetramethylxylylene diisocyanate (TMXDI) or cyclohexane diisocyanate.
- IPDI isophorone diisocyanate
- HDI hexamethylene diisocyanate
- TMXDI tetramethylxylylene diisocyanate
- cyclohexane diisocyanate cyclohexane diisocyanate.
- the content in the PU prepolymer composition according to the invention is preferably less than 0.3% by weight and particularly preferably less than 0, 1% by weight.
- the latter isocyanate compounds include, in particular, tolylene diisocyanate (TDI).
- TDI tolylene diisocyanate
- the polyurethane prepolymer has a monomeric polyisocyanate content, in particular MDI and / or TDI, of less than 0.07% by weight.
- the polyurethane prepolymer thus produced with a low content of monomeric polyisocyanate is expediently used together with customary hardeners and / or moisture, if desired in the presence of organic solvents and customary accelerators and additives, for bonding plastics, metals and papers, in particular films and in particular in the area of flexible packaging, the bonding preferably taking place at temperatures between 20 and 120 ° C.
- the viscosity in particular for the flexible packaging, is in a low range, which is understood to mean a viscosity (measured according to Brookfield, ISO 2555) which is 100 mPas to 25,000 mPas at 100 ° C., preferably 200 mPas to 10,000 mPas and in particular 250 to Is 5,000 mPas.
- the isocyanate content is high and is in the range from 1 to 10% by weight, preferably in the range from 2 to 7% by weight.
- the monomer content of unreacted monomeric polyisocyanate can be well below 1% by weight.
- a sealed flat bag is stored filled with 3% acetic acid at 70 ° C.
- the contents of the bag are diazotized after a storage time of 2 hours, subjected to an azo coupling and concentrated on a C-is column. The concentration is then determined photometrically.
- the migration of non-volatile diisocyanates and other compounds can lead to disturbances, e.g. when sealing bonded film composites, especially with CPA / EVA laminates.
- the PU prepolymers according to the invention are suitable in bulk or as a solution in organic solvents for bonding plastics, metals and papers, in particular for laminating aluminum and plastic films and metal or oxide-vapor-coated films and papers.
- Common hardeners such as polyfunctional higher molecular alcohols (2-component systems) can be added or surfaces with a defined moisture content can be directly bonded to the products according to the invention.
- Film composites produced with the products according to the invention show high processing reliability during heat sealing. This is possibly due to the greatly reduced proportion of low molecular weight products capable of migration in the prepolymers.
- component (Ia) prepared above was mixed with the low-monomer, polyisocyanate (II) containing urethane groups in the weight ratios indicated above (addition ratio in this stage is 0.15 to 0.55: 1) and the mixture was heated with stirring, where the reaction temperature should not exceed 80 ° C. The end of the reaction was determined with an NCO titration value of 4.4% (theoretical value:
- the free monomeric polyisocyanate content was 0.06% by weight of TDI and less than 0.02% by weight of MDI.
- component (Ia) prepared above was mixed with the low-monomer, polyisocyanate (II) containing urethane groups in the weight ratios indicated above (addition ratio in this stage is 0.1: 1) and the mixture was heated with stirring, the reaction temperature being 80 ° C was not allowed to exceed. The end of the reaction was reached with an NCO titration value of 4.1% (theoretical value: 4.1%).
- the viscosity measured according to Brookfield, spindle 27, 30 rpm, 70 ° C., was 4900 mPas.
- the free monomeric polyisocyanate content was below 0.02% by weight of MDI and below 0.02% by weight of TDI.
- stage 2 1 1, 6, based on the residual OH from stage 1.
- the viscosity measured according to Brookfield, spindle 27, 30 rpm, 60 ° C., was 1980 mPas.
- TDI Desmodur T 100, Bayer AG
- component (Ib) prepared above was mixed with 20% by weight of the low-monomer, polyisocyanate (II) containing urethane groups and homogenized with stirring and heating, the mixing temperature not being allowed to exceed 70 ° C.
- the homogeneous mixture had an NCO titration value of 8.2% (theoretically 8.3%).
- the viscosity measured according to Brookfield, spindle 27, 30 rpm, 50 ° C., was 5,000 mPas.
- the free monomeric polyisocyanate content was less than 0.02% by weight (MDI monomer content) or 0.7% by weight (TDI monomer content).
- MDI 4,4'-diphenylmethane diisocyanate
- component (Ic) prepared above was mixed with the low-monomer, urethane group-containing polyisocyanate (II) in the weight ratios indicated above (addition ratio in this stage is 1.0 to 1.4: 1) and the mixture was heated with stirring, where the reaction temperature should not exceed 80 ° C. The end of the reaction was reached with an NCO titration value of 2.0% (theoretical value: 2.3%).
- the viscosity measured according to Brookfield, spindle 27, 30 rpm, 100 ° C., was 22,500 mPas.
- the free monomeric polyisocyanate content (MDI monomer content) was below 0.02% by weight.
- lamination tests were carried out on a laminating machine from Polytype.
- the polyurethane prepolymer of Examples A + B according to the invention was treated with a polyester-polyether polyol (Liofol UR 6067-27, from Henkel, OH number) 255) in a mixing ratio of 9: 1 for example A and 8.5: 1 for example B and then applied at 70 ° C.
- the application weight of the mixture was 2 g / m 2 .
- CPP cast polypropylene
- aluminum foil with a foil thickness of 50 micrometers / 12 micrometers
- Polyethylene film (LLDPE film) with a film thickness of 70 micrometers
- the bond adhesion and the seal seam adhesion are measured with a Zwick Z2.5 universal tensile testing machine on 15 mm wide strips. (Test speed: 100 mm / min., Trigger angle 90 °)
- Example A for the film composite CPP / aluminum to LLDPE in Table 1 (Tab. 1), for the film composite CPA / LDPE in Table 2 (Tab. 2) and for Example B for the film composite CPP / aluminum to LLDPE in Table 3 (Tab. 3) and for the film composite CPA / LDPE in Table 4 (Tab. 4), listed for the film composite.
- lamination tests were carried out on a laminating machine from Polytype.
- the application weight of the mixture was 2 g / m 2 .
- PET Polyethylene terephthalate
- the bond adhesion and the seal seam adhesion are measured with a Zwick Z2.5 universal tensile testing machine on 15 mm wide strips. (Test speed: 100 mm / min., Trigger angle 90 °).
- lamination tests were carried out on a laminating machine from Polytype.
- the application weight of the mixture was 2 g / m 2 .
- LLDPE film Polyethylene film with a film thickness of 70 ⁇ m
- the bond adhesion and the seal seam adhesion of the inner layer CPP / aluminum to PE were measured with a Zwick Z2.5 universal tensile testing machine on 15 mm wide strips. (Test speed: 100 mm / min., Trigger angle 90 °)
- the laminated foils were stored and measured at room temperature.
- the monomeric polyisocyanate in the polyurethane prepolymers according to the invention was determined by means of gel permeation chromatography (GPC) or high-performance liquid chromatography (HPLC) using an in-house method.
- hydroxyl number was determined according to ISO 4326.
- the NCO content was determined titrimetrically according to Spiegelberger (EN ISO
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- Health & Medical Sciences (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
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DE10062583 | 2000-12-15 | ||
DE10062587 | 2000-12-15 | ||
DE10062587 | 2000-12-15 | ||
DE10062584 | 2000-12-15 | ||
DE10062583 | 2000-12-15 | ||
DE10062584 | 2000-12-15 | ||
PCT/EP2001/014324 WO2002048227A2 (de) | 2000-12-15 | 2001-12-06 | Polyurethan-prepolymere mit nco-gruppen und niedrigem gehalt an monomeren polyisocyanat |
Publications (2)
Publication Number | Publication Date |
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EP1341832A2 true EP1341832A2 (de) | 2003-09-10 |
EP1341832B1 EP1341832B1 (de) | 2016-10-19 |
Family
ID=27214197
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP01986855.3A Expired - Lifetime EP1341832B1 (de) | 2000-12-15 | 2001-12-06 | Polyurethan-prepolymere mit nco-gruppen und niedrigem gehalt an monomeren polyisocyanat |
Country Status (7)
Country | Link |
---|---|
US (1) | US6903167B2 (de) |
EP (1) | EP1341832B1 (de) |
BR (1) | BR0116194A (de) |
CA (1) | CA2431961A1 (de) |
DE (1) | DE10157488A1 (de) |
ES (1) | ES2610388T3 (de) |
WO (1) | WO2002048227A2 (de) |
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DE10229519A1 (de) * | 2001-07-10 | 2003-01-30 | Henkel Kgaa | Reaktive Polyurethane mit einem geringen Gehalt an monomeren Diisocyanaten |
DE10150722A1 (de) * | 2001-10-13 | 2003-04-30 | Henkel Kgaa | Reaktive Polyurethan-Zusammensetzungen mit niedrigem Restmonomergehalt |
CA2471252A1 (en) * | 2001-12-18 | 2003-06-26 | Henkel Kommanditgesellschaft Auf Aktien | Method for producing polyurethane prepolymers having a low content of monomers |
EP1338635B2 (de) † | 2002-02-22 | 2020-10-14 | Jowat AG | Polyurethan-Zusammensetzungen mit geringem Anteil an Diisocyanatmonomer(en) |
DE102004018048A1 (de) * | 2004-04-08 | 2005-11-10 | Henkel Kgaa | Verfahren zur Herstellung von Polyurethan-Prepolymeren |
WO2006011256A1 (ja) * | 2004-07-30 | 2006-02-02 | Mitsui Chemicals Polyurethanes, Inc. | 2液硬化型無溶剤系接着剤 |
US7115697B2 (en) * | 2004-08-31 | 2006-10-03 | E. I. Du Pont De Nemours And Company | Adhesive for high-temperature laminate |
DE102005012794A1 (de) * | 2005-03-19 | 2006-09-21 | Bayer Materialscience Ag | Poly(etherester)polyole und Verfahren zu ihrer Herstellung |
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DE102006059464A1 (de) * | 2006-12-14 | 2008-06-19 | Henkel Kgaa | Polyurethan-Kaschierklebstoff |
DE102008039679A1 (de) * | 2008-08-26 | 2010-03-04 | Henkel Ag & Co. Kgaa | Verfahren zum Kaschieren von Folien |
US8455679B2 (en) * | 2008-12-12 | 2013-06-04 | Basf Se | Prepolymer systems having reduced monomeric isocyanate contents |
DE102009005017A1 (de) * | 2009-01-17 | 2010-07-22 | Bayer Materialscience Ag | Reaktive Polyurethan Zusammensetzungen |
DE102011080513A1 (de) * | 2011-08-05 | 2013-02-07 | Henkel Ag & Co. Kgaa | Monomerarme Polyurethanschäume |
TWI486407B (zh) * | 2012-07-09 | 2015-06-01 | Wistron Corp | 水性塗料以及具有平滑表面的物件的形成方法 |
PL405383A1 (pl) | 2013-09-18 | 2015-03-30 | Wrocławskie Centrum Badań Eit + Spółka Z Ograniczoną Odpowiedzialnością | Jednoskładnikowa kompozycja do wytwarzania pianki poliuretanowej w tym o zmniejszonej zawartości MDI i o obniżonej gęstości oraz jej zastosowanie |
US9982173B2 (en) * | 2014-03-11 | 2018-05-29 | Sika Technology Ag | Polyurethane hot-melt adhesive having a low content of diisocyanate monomers and good cross-linking speed |
DE102015207792A1 (de) * | 2015-04-28 | 2016-11-03 | Henkel Ag & Co. Kgaa | Polyurethan-basiertes Bindemittel-System |
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EP3741812A1 (de) | 2019-05-20 | 2020-11-25 | Henkel AG & Co. KGaA | Verfahren zur herstellung von zumindest teilweise exfoliertem ton unter verwendung eines exfolierungsmittel enthaltend einen partiellen ester eines poly(alkylenoxid)(meth)acrylates, ein zyklisches karbonat und wasser |
WO2020233867A1 (en) | 2019-05-20 | 2020-11-26 | Henkel Ag & Co. Kgaa | Method for preparing an at least partially exfoliated clay using an exfoliation agent comprising an partial ester of poly(alkylene oxide) (meth)acrylate, a cyclic carbonate and water |
WO2022179772A1 (en) | 2021-02-26 | 2022-09-01 | Henkel Ag & Co. Kgaa | Flame-retardant adhesive composition for structural wood bonding |
Also Published As
Publication number | Publication date |
---|---|
BR0116194A (pt) | 2003-12-23 |
US20040014847A1 (en) | 2004-01-22 |
ES2610388T3 (es) | 2017-04-27 |
DE10157488A1 (de) | 2002-06-20 |
WO2002048227A3 (de) | 2002-08-29 |
WO2002048227A2 (de) | 2002-06-20 |
EP1341832B1 (de) | 2016-10-19 |
CA2431961A1 (en) | 2002-06-20 |
US6903167B2 (en) | 2005-06-07 |
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